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Thread: GSI Boost and dump valves (again!)

  
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    wiley's Avatar
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    GSI Boost and dump valves (again!)

    Long story short, i've recently bought a 2003 GSI, a dump valve has already been fitted (DV26) which, (like a few others) seems really, really quiet. I've taken it to a few places who have all pretty much said the same thing - the Z20LET doesn't make enough boost to get one really kicking off I must admit, you don't really notice the turbo's there!

    Is this right? or should I be taking it elsewhere?

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    nasayr's Avatar
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    put a stainless cone filter on, and see how much things progress..
    "Don't waste your time on jealousy. Sometimes you're ahead, sometimes you're behind. The race is long, and in the end it's only with yourself"

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    OK cheers mate, i'll get one on order. Which make is best though?

    Probably gonna just drop the Bailey now, think it's leaking boost. Might as well replace the cut up pipe work for something better, I.E Samco or some of Courtenay's own silicone? Any recommendations?

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    The reason that it is not that loud is because when the car is running standard boost it only preduces about 1 bar. When i had me car re-maped it made a big differance to the noise level of the dump valve on my car. Also do u know if there is a spacer blanking the std valve in the side o the turbo as that will effect it as well. Don't put a cone filter on as they tend to draw hot air in but are very noisey as well. I can't see how that would make the atmo dump valve any louder.

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    lee gsi's Avatar
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    Put a oneway valve in the standard vacume pipe

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    as is said. you have both dump valves running. i had same pob. once you block off origional u will be much happier.
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    OK guys, thank you for the advice. I've got it booked in now on Tuesday, so hopefully the car will be happier after that!

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    one way valve lee says is the best

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